All-Day Activity

Find fitnesseverywhere you look.

See how every step adds up with One, which tracks all-day activity like steps taken, distance traveled, floors climbed and calories burned.

See how every step adds up with One, which tracks all-day activity like steps taken, distance traveled, floors climbed and calories burned.

Clock + Display

See everydayon display.

Get motivated to meet your goals with a tracker that keeps daily stats and time on display. One shows all your activity with the push of a button—giving you the encouragement you need to be more active and make better choices throughout the day.

Get motivated to meet your goals with a tracker that keeps daily stats and time on display. One shows all your activity with the push of a button—giving you the encouragement you need to be more active and make better choices throughout the day.

Sleep + Alarms

Know your dayfrom A to ZZZs

Measure your sleep quality at night by slipping One into the sleep wristband that’s included with your tracker. Then, set a silent alarm to wake with a gentle vibration that won’t disturb your partner.

Measure your sleep quality at night by slipping One into the sleep wristband that’s included with your tracker. Then, set a silent alarm to wake with a gentle vibration that won’t disturb your partner.

Wireless Syncing

All your stats,always in sync.

One syncs your daily stats to your computer and 150+ leading smartphones, and shows your progress in easy-to-read charts and graphs, so you can see how close you are to your goals—anytime, anywhere.

One syncs your daily stats to your computer and 150+ leading smartphones, and shows your progress in easy-to-read charts and graphs, so you can see how close you are to your goals—anytime, anywhere.

Wear + Life

By your side,day and night.

One clips securely and discreetly onto your pocket, belt or bra, has a battery life of 10+ days, and is rain, splash and sweat-proof—so no matter what your week looks like, you’re always ready to make it count.

One clips securely and discreetly onto your pocket, belt or bra, has a battery life of 10+ days, and is rain, splash and sweat-proof—so no matter what your week looks like, you’re always ready to make it count.

Sensors and Components

Display

Battery and Power

We recommend charging your One weekly to ensure you are always tracking.

Battery life: 10-14 days

Battery type: Lithium-polymer

Charge time: One to two hours

Radio transceiver: Bluetooth 4.0

Memory

Tracks 7 days of detailed motion data – minute by minute.

Tracks daily totals for past 23 days

Water Resistance

One is sweat, rain and splash proof. However, the device is not swim proof. With any clip-based wearable device, it’s best for your skin if the clip stays dry and clean.

Care

You can clip One to a belt, pocket or bra. Always use the silicone holder when clipping it to a bra or waistband as the plastic One tracker is not meant to be worn in direct contact with the skin. Make sure the One display faces outward when clipped to your bra. Learn more

Materials

The One tracker is made of thermoplastic. The clip is made of silicone and metal.

Sensors and Components

Display

Battery and Power

We recommend charging your One weekly to ensure you are always tracking.

Battery life: 10-14 days

Battery type: Lithium-polymer

Charge time: One to two hours

Radio transceiver: Bluetooth 4.0

Memory

Tracks 7 days of detailed motion data – minute by minute.

Tracks daily totals for past 23 days

What’s Included

Fitbit One™ trackerCharging cableWireless sync dongle

Silicon clipSleep wristband

Water Resistance

One is sweat, rain and splash proof. However, the device is not swim proof. With any clip-based wearable device, it’s best for your skin if the clip stays dry and clean.

Care

You can clip One to a belt, pocket or bra. Always use the silicone holder when clipping it to a bra or waistband as the plastic One tracker is not meant to be worn in direct contact with the skin. Make sure the One display faces outward when clipped to your bra. Learn more

Materials

The One tracker is made of thermoplastic. The clip is made of silicone and metal.